Erasing Hard Drive Data permanently

If I'm trying to sell an old PC, what's the best way to erase my information?

Obviously, make sure everything in the computer works and that you’ve moved
your data off of the hard drive. Once you’ve done that, use
Data Sanitizer to completely erase the drive and make sure data recovery
is impossible. The general standard is that it’s a good idea to erase and
rewrite over a drive at least 3 times. The included sanitizing profiles feature
rewrite standards that exceed those prescribed by the US Department of Defense and
the US Navy. Even if you’re sure that the person you’re selling to isn’t
going to do anything with your data, this is the only way to ensure that recovery
is impossible.

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CNET Editor Review“We found that the program discovered the folder and file structure
faster than many similar programs”

Testimonials

Yep, I used our scanpst.exe as well as 4 other utilities. Yours was the only one
that showed me it could recover messages.Chris KnaffMicrosoft

Yes it really did work! My drive was "unreadable" by windows or anything
else I threw at it. The drive was good, but no data. This software brought back
about 95% of a 500GB drive!Reviewer: legoman549 Download.com

Thanks for the great customer service. Getting answers quickly that really help
makes an enormous difference when a project is on the line.K. Edw. Lynch

Thank you! It is nice to deal with professionals!
In spite of my PC being re-imaged, having several applications installed and being
used daily for about a week, your product was able to recover most of my lost files!George M. Bigham
Thomson